﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Web;
using System.Configuration;
using System.Diagnostics;
using System.Net.Sockets;

namespace VCommons
{
    public class FtpUpload
    {
        #region ftp登录信息

        private string ftpServerIP;
        private string ftpUserID;
        private string ftpPassword;
        private FtpWebRequest reqFTP;

        /// <summary>
        /// ftp登录信息
        /// </summary>
        /// <param name="ftpServerIP">ftpServerIP</param>
        /// <param name="ftpUserID">ftpUserID</param>
        /// <param name="ftpPassword">ftpPassword</param>
        public FtpUpload(string ftpServerIP, string ftpUserID, string ftpPassword, string ftpPort)
        {
            this.ftpServerIP = ftpServerIP + ":" + ftpPort;
            this.ftpUserID = ftpUserID;
            this.ftpPassword = ftpPassword;

        }

        public FtpUpload()
        {
            this.ftpServerIP = WebConfig.GetWebConfig("FtpAddress", "127.0.0.1") + ":" + WebConfig.GetWebConfig("FtpPort", "21");
            this.ftpUserID = WebConfig.GetWebConfig("FtpUser", "");
            this.ftpPassword = WebConfig.GetWebConfig("FtpPwd", "");
        }

        #region 连接
        /// <summary>
        /// 连接
        /// </summary>
        /// <param name="path"></param>
        private void Connect(String ftpUrl)//连接ftp
        {
            // 根据uri创建FtpWebRequest对象
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpUrl));
            // 指定数据传输类型
            reqFTP.UseBinary = true;
            // ftp用户名和密码
            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
        }
        #endregion


        #endregion

        #region 获取文件列表
        /// <summary>
        /// 获取文件列表
        /// </summary>
        /// <param name="path"></param>
        /// <param name="WRMethods">WebRequestMethods.Ftp.UploadFile</param>
        /// <returns></returns>
        private string[] GetFileList(string path, string WRMethods)
        {
            string[] downloadFiles;
            StringBuilder result = new StringBuilder();
            try
            {
                Connect(path);
                reqFTP.Method = WRMethods;
                WebResponse response = reqFTP.GetResponse();
                StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.UTF8);//中文文件名
                string line = reader.ReadLine();
                while (line != null)
                {
                    result.Append(line);
                    result.Append("\n");
                    line = reader.ReadLine();
                }
                // to remove the trailing '\n'
                result.Remove(result.ToString().LastIndexOf('\n'), 1);
                reader.Close();
                response.Close();
                return result.ToString().Split('\n');
            }
            catch (Exception ex)
            {
                Console.Write("{0}\r\n{1}\r\n{2}", ex.Message, ex.Source, ex.StackTrace);
                downloadFiles = null;
                return downloadFiles;
            }
        }

        public string[] GetFileList(string path)//上面的代码示例了如何从ftp服务器上获得文件列表
        {
            path = string.IsNullOrEmpty(path) ? "" : path + "/";
            return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectory);
        }

        public string[] GetFileList()//上面的代码示例了如何从ftp服务器上获得文件列表
        {
            return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectory);
        }

        #endregion

        #region 上传文件

        /// <summary>
        /// 上传文件
        /// </summary>
        /// <param name="localFile">本地文件绝对路径</param>
        /// <param name="filename">保存的文件名称</param>
        /// <param name="path">上传的路径</param>     
        /// <returns></returns>
        public bool Upload(string localFile, string filename, string path) //上面的代码实现了从ftp服务器上载文件的功能
        {
            string errorinfo = "";
            path = path.Replace("\\", "/");
            FileInfo fileInf = new FileInfo(localFile);
            path = string.IsNullOrEmpty(path) ? "" : path + "/";
            string uri = "ftp://" + ftpServerIP + "/" + path + filename;
            Connect(uri);//连接         
            // 默认为true，连接不会被关闭
            // 在一个命令之后被执行
            reqFTP.KeepAlive = false;
            // 指定执行什么命令
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
            // 上传文件时通知服务器文件的大小
            reqFTP.ContentLength = fileInf.Length;
            // 缓冲大小设置为kb 
            int buffLength = 2048;
            byte[] buff = new byte[buffLength];
            int contentLen;
            // 打开一个文件流(System.IO.FileStream) 去读上传的文件
            FileStream fs = fileInf.OpenRead();
            try
            {
                // 把上传的文件写入流
                Stream strm = reqFTP.GetRequestStream();
                // 每次读文件流的kb
                contentLen = fs.Read(buff, 0, buffLength);
                // 流内容没有结束
                while (contentLen != 0)
                {
                    // 把内容从file stream 写入upload stream 
                    strm.Write(buff, 0, contentLen);
                    contentLen = fs.Read(buff, 0, buffLength);
                }
                // 关闭两个流
                strm.Close();
                fs.Close();
                errorinfo = "完成";
                return true;
            }
            catch (Exception ex)
            {
                errorinfo = string.Format("因{0},无法完成上传", ex.Message);
                return false;
            }
        }

        /// <summary>
        /// FTP上传文件到根目录，保留原文件名
        /// </summary>
        /// <param name="fuClientFileUpload"></param>
        /// <returns></returns>
        public bool Upload(HttpPostedFileBase fuClientFileUpload)
        {
            return Upload(fuClientFileUpload, null, null);
        }

        /// <summary>
        /// htmlFileUploads上传文件
        /// </summary>
        /// <param name="fuClientFileUpload">上传控件</param>
        /// <param name="filename">保存的文件名称</param>
        /// <param name="path">保存的路径，不加/,但必须存在</param>      
        /// <returns></returns>
        public bool Upload(HttpPostedFileBase fuClientFileUpload, string filename, string path)
        {

            string errorInfo = "";
            Stream input = fuClientFileUpload.InputStream;
            path = string.IsNullOrEmpty(path) ? "" : path + "/";
            path = path.Replace("\\", "/");
            filename = string.IsNullOrWhiteSpace(filename)
                       ? fuClientFileUpload.FileName.Substring(fuClientFileUpload.FileName.LastIndexOf("\\") + 2)
                       : filename;
            string uri = "ftp://" + ftpServerIP + "/" + path + filename;
            Connect(uri);//连接         
            // 默认为true，连接不会被关闭
            // 在一个命令之后被执行
            reqFTP.KeepAlive = false;
            // 指定执行什么命令
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
            // 上传文件时通知服务器文件的大小
            reqFTP.ContentLength = input.Length;
            // 缓冲大小设置为kb 
            int buffLength = 2048;
            byte[] buff = new byte[buffLength];
            int contentLen;
            // 打开一个文件流(System.IO.FileStream) 去读上传的文件

            try
            {
                // 把上传的文件写入流
                Stream strm = reqFTP.GetRequestStream();
                // 每次读文件流的kb
                contentLen = input.Read(buff, 0, buffLength);
                // 流内容没有结束
                while (contentLen != 0)
                {
                    // 把内容从file stream 写入upload stream 
                    strm.Write(buff, 0, contentLen);
                    contentLen = input.Read(buff, 0, buffLength);
                }
                // 关闭两个流
                strm.Close();
                input.Close();
                errorInfo = "完成";
                return true;
            }
            catch (Exception ex)
            {
                errorInfo = string.Format("因{0},无法完成上传", ex.Message);
                return false;
            }
        }

        #endregion

        #region 续传文件
        /// <summary>
        /// 续传文件(上传前先获取长度)
        /// </summary>
        /// <param name="localFile"></param>
        /// <param name="filename"></param>     
        /// <param name="path"></param>
        /// <param name="errorinfo"></param>
        /// <returns></returns>
        public bool Upload(string localFile, string filename, string path, out string errorinfo) //上面的代码实现了从ftp服务器上载文件的功能
        {
            long size = GetFileSize(filename, path);
            path = path.Replace("\\", "/");
            FileInfo fileInf = new FileInfo(localFile);
            path = string.IsNullOrEmpty(path) ? "" : path + "/";
            string uri = "ftp://" + ftpServerIP + "/" + path + filename;
            //string uri = "ftp://" + path;
            Connect(uri);//连接         
            // 默认为true，连接不会被关闭
            // 在一个命令之后被执行
            reqFTP.KeepAlive = false;
            // 指定执行什么命令         
            reqFTP.Method = WebRequestMethods.Ftp.AppendFile;
            // 上传文件时通知服务器文件的大小
            reqFTP.ContentLength = fileInf.Length;
            // 缓冲大小设置为kb 
            int buffLength = 2048;
            byte[] buff = new byte[buffLength];
            int contentLen;
            // 打开一个文件流(System.IO.FileStream) 去读上传的文件
            FileStream fs = fileInf.OpenRead();
            try
            {
                StreamReader dsad = new StreamReader(fs);
                fs.Seek(size, SeekOrigin.Begin);
                // 把上传的文件写入流
                Stream strm = reqFTP.GetRequestStream();
                // 每次读文件流的kb
                contentLen = fs.Read(buff, 0, buffLength);
                // 流内容没有结束
                while (contentLen != 0)
                {
                    // 把内容从file stream 写入upload stream 
                    strm.Write(buff, 0, contentLen);
                    contentLen = fs.Read(buff, 0, buffLength);
                }
                // 关闭两个流
                strm.Close();
                fs.Close();
                errorinfo = "完成";
                return true;
            }
            catch (Exception ex)
            {
                errorinfo = string.Format("因{0},无法完成上传", ex.Message);
                return false;
            }
        }
        #endregion

        #region 下载文件
        /// <summary>
        /// 下载文件
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="fileName"></param>
        /// <param name="errorinfo"></param>
        /// <returns></returns>
        public bool Download(string ftpfilepath, string filePath, string fileName, out string errorinfo)
        {
            try
            {
                filePath = filePath.Replace("我的电脑\\", "");
                String onlyFileName = Path.GetFileName(fileName);
                string newFileName = filePath + onlyFileName;
                if (File.Exists(newFileName))
                {
                    errorinfo = string.Format("本地文件{0}已存在,无法下载", newFileName);
                    return false;
                }
                ftpfilepath = ftpfilepath.Replace("\\", "/");
                string url = "ftp://" + ftpServerIP + "/" + ftpfilepath;
                Connect(url);//连接 
                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                Stream ftpStream = response.GetResponseStream();
                long cl = response.ContentLength;
                int bufferSize = 2048;
                int readCount;
                byte[] buffer = new byte[bufferSize];
                readCount = ftpStream.Read(buffer, 0, bufferSize);
                FileStream outputStream = new FileStream(newFileName, FileMode.Create);
                while (readCount > 0)
                {
                    outputStream.Write(buffer, 0, readCount);
                    readCount = ftpStream.Read(buffer, 0, bufferSize);
                }
                ftpStream.Close();
                outputStream.Close();
                response.Close();
                errorinfo = "";
                return true;
            }
            catch (Exception ex)
            {
                errorinfo = string.Format("因{0},无法下载", ex.Message);
                return false;
            }
        }
        #endregion

        #region 删除文件
        /// <summary>
        /// 删除文件
        /// </summary>
        /// <param name="fileName"></param>
        /// <param name="path"></param>
        /// <returns></returns>
        public bool DeleteFileName(string fileName, string path)
        {
            try
            {
                path = string.IsNullOrEmpty(path) ? "" : path + "/";
                string uri = "ftp://" + ftpServerIP + "/" + path + fileName;
                Connect(uri);//连接         
                // 默认为true，连接不会被关闭
                // 在一个命令之后被执行
                reqFTP.KeepAlive = false;
                // 指定执行什么命令
                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();
                return true;
            }
            catch (Exception ex)
            {
                Console.Write("{0}\r\n{1}\r\n{2}", ex.Message, ex.Source, ex.StackTrace);
                return false;
            }
        }
        #endregion

        #region 在ftp上创建目录
        /// <summary>
        /// 在ftp上创建目录
        /// </summary>
        /// <param name="dirName"></param>
        /// <param name="path"></param>
        /// <returns></returns>
        public bool MakeDir(string dirName, string path)
        {
            try
            {
                path = string.IsNullOrEmpty(path) ? "" : path + "/";
                string uri = "ftp://" + ftpServerIP + "/" + path + dirName;
                Connect(uri);//连接      
                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;

                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();
                return true;
            }
            catch (Exception ex)
            {
                Console.Write("{0}\r\n{1}\r\n{2}", ex.Message, ex.Source, ex.StackTrace);
                return false;
            }
        }
        #endregion

        #region 删除ftp上目录
        /// <summary>
        /// 删除ftp上目录
        /// </summary>
        /// <param name="dirName"></param>
        /// <param name="path"></param>
        /// <returns></returns>
        public bool delDir(string dirName, string path)
        {
            try
            {
                path = string.IsNullOrEmpty(path) ? "" : path + "/";
                string uri = "ftp://" + ftpServerIP + "/" + path + dirName;
                Connect(uri);//连接      
                reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();
                return true;
            }
            catch (Exception ex)
            {
                Console.Write("{0}\r\n{1}\r\n{2}", ex.Message, ex.Source, ex.StackTrace);
                return false;
            }
        }
        #endregion

        #region 获得ftp上文件大小
        /// <summary>
        /// 获得ftp上文件大小
        /// </summary>
        /// <param name="filename">ftp上文件名称</param>
        /// <param name="path">ftp路径</param>
        /// <returns></returns>
        public long GetFileSize(string filename, string path)
        {
            long fileSize = 0;
            filename = filename.Replace("\\", "/");
            try
            {
                path = string.IsNullOrEmpty(path) ? "" : path + "/";
                string uri = "ftp://" + ftpServerIP + "/" + path + filename;

                //  string uri = "ftp://" + filename;
                Connect(uri);//连接      
                reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                fileSize = response.ContentLength;
                response.Close();
            }
            catch (Exception ex)
            {
                fileSize = 0;
                Console.Write("{0}\r\n{1}\r\n{2}", ex.Message, ex.Source, ex.StackTrace);
            }
            return fileSize;
        }
        #endregion

        #region ftp上文件改名
        /// <summary>
        /// ftp上文件改名
        /// </summary>
        /// <param name="currentFilename"></param>
        /// <param name="newFilename"></param>
        /// <param name="path"></param>
        /// <returns></returns>
        public bool Rename(string currentFilename, string newFilename, string path)
        {
            try
            {
                path = string.IsNullOrEmpty(path) ? "" : path + "/";
                string uri = "ftp://" + ftpServerIP + "/" + path + currentFilename;
                Connect(uri);//连接
                reqFTP.Method = WebRequestMethods.Ftp.Rename;
                reqFTP.RenameTo = newFilename;
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                //Stream ftpStream = response.GetResponseStream();
                //ftpStream.Close();
                response.Close();
                return true;
            }
            catch (Exception ex)
            {
                Console.Write("{0}\r\n{1}\r\n{2}", ex.Message, ex.Source, ex.StackTrace);
                return false;
            }
        }
        #endregion

        #region 获得文件明晰
        /// <summary>
        /// 获得文件明晰
        /// </summary>
        /// <returns></returns>
        public string[] GetFilesDetailList()
        {
            return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectoryDetails);
        }
        /// <summary>
        /// 获得文件明晰
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public string[] GetFilesDetailList(string path)
        {
            path = path.Replace("\\", "/");
            path = string.IsNullOrEmpty(path) ? "" : path + "/";
            return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectoryDetails);
        }
        #endregion
    }
}
